CN1151097C - A kind of method that urea solution directly prepares nitrogen, phosphorus and potassium compound fertilizer - Google Patents
A kind of method that urea solution directly prepares nitrogen, phosphorus and potassium compound fertilizer Download PDFInfo
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- CN1151097C CN1151097C CNB001162357A CN00116235A CN1151097C CN 1151097 C CN1151097 C CN 1151097C CN B001162357 A CNB001162357 A CN B001162357A CN 00116235 A CN00116235 A CN 00116235A CN 1151097 C CN1151097 C CN 1151097C
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- fertilizer
- add
- phosphorus
- urea
- granulation
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 88
- 239000004202 carbamide Substances 0.000 title claims abstract description 64
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000011574 phosphorus Substances 0.000 title claims abstract description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 12
- 150000003112 potassium compounds Chemical class 0.000 title abstract 3
- 238000005469 granulation Methods 0.000 claims abstract description 43
- 230000003179 granulation Effects 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 19
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011591 potassium Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- 210000003608 fece Anatomy 0.000 claims description 25
- 239000010871 livestock manure Substances 0.000 claims description 25
- 239000002131 composite material Substances 0.000 claims description 15
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 12
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 11
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 241000196324 Embryophyta Species 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 6
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 208000006558 Dental Calculus Diseases 0.000 claims description 5
- 235000019270 ammonium chloride Nutrition 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical group O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- -1 phospho Chemical class 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000005696 Diammonium phosphate Substances 0.000 claims description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 4
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 4
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 4
- 229910000388 diammonium phosphate Inorganic materials 0.000 claims description 4
- 235000019838 diammonium phosphate Nutrition 0.000 claims description 4
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 4
- 239000006012 monoammonium phosphate Substances 0.000 claims description 4
- 229940072033 potash Drugs 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 235000015320 potassium carbonate Nutrition 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 3
- 239000004021 humic acid Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims description 3
- 239000004323 potassium nitrate Substances 0.000 claims description 3
- 241000195940 Bryophyta Species 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 claims description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
- 244000144972 livestock Species 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000003415 peat Substances 0.000 claims description 2
- 235000021317 phosphate Nutrition 0.000 claims description 2
- 244000144977 poultry Species 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 description 24
- 235000015097 nutrients Nutrition 0.000 description 10
- 239000002994 raw material Substances 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 7
- 238000007601 warm air drying Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000008187 granular material Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- QLULGSLAHXLKSR-UHFFFAOYSA-N azane;phosphane Chemical compound N.P QLULGSLAHXLKSR-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000001103 potassium chloride Substances 0.000 description 3
- 235000011164 potassium chloride Nutrition 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000004254 Ammonium phosphate Substances 0.000 description 2
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 2
- 235000019289 ammonium phosphates Nutrition 0.000 description 2
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000287828 Gallus gallus Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- AWADHHRPTLLUKK-UHFFFAOYSA-N diazanium sulfuric acid sulfate Chemical compound [NH4+].[NH4+].OS(O)(=O)=O.[O-]S([O-])(=O)=O AWADHHRPTLLUKK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G1/00—Mixtures of fertilisers belonging individually to different subclasses of C05
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The present invention relates to a method for directly preparing a nitrogen, phosphorus and potassium compound fertilizer by a urea solution. A urea solution with the concentration of 65.0 to 99.7%(weight) and the temperature of 80 to 140 DEG C is sprayed on a base fertilizer containing nitrogen, phosphorus and potassium in a granulator for swing granulation, and then an obtained material is dried, cooled and sieved to obtain a granular nitrogen, phosphorus and potassium compound fertilizer. The present invention simplifies a production process and reduces production cost, the enhancement of granulating temperature lightens the load of a drying process, a granulation rate is enhanced, and production capacity is increased for producing a high-nitrogen compound fertilizer; a production device uses automation control, which has the advantages of easy operation, stable production process and stable product quality.
Description
[technical field]
The present invention relates to a kind of production method of NpK complex fertilizer, relate to a kind of base fertilizer mixing granulation of urea soln and nitrogenous, phosphorus, potassium that utilizes or rather and directly produce the method for compound manure.
[background technology]
Existing technology of producing compound manure mainly is to utilize solid base fertilizer batching to produce; be exactly with nitrogenous; phosphorus; the base fertilizer of potassium; as urea; the phosphorus ammonium; fertilizer such as Repone K are broken respectively; enter mixing tank after the metering respectively then; mixed material is sent into rotary drum granulator through bucket elevator; the rotation of material nationality cylindrical shell in tablets press; form the fluidized-bed that constantly rolls; in the fluidized-bed that rolls, be embedded with steam jet; feed steam to material; steam condenses into water when temperature of charge is raise, required moisture when granulation is provided, and moisture makes the dissolving of part fertilizer salt; produce the salts solution of some amount; the surface tension reunion cluster that the fertilizer powder is produced by salts solution, the material bed squeeze that is flowing; under the effect of frictional force, be agglomerated into spheroidal particle.Material after the granulation is delivered directly to the rotary drying kiln inner drying, promptly gets qualified product through the exsiccant material through cooling, screening.This technology production process is simple, and operation is easy to grasp, but required moisture height when having the material granulating, drying load is big, the defective that granule strength is not high, in addition, prilling temperature is low, generally at 20～40 ℃, is unsuitable for the production of the compound manure of nitrogen content height (as containing more than the N20%).
Chinese patent application CN1158831A and CN1221716A disclose two kinds of methods of utilizing urine system composite fertilizer, these two kinds of methods utilize the urea liquid of urea plant and sylvite making low-melting melting charge slurry below 120 ℃, it is sprayed onto makes granular composite fertilizer on other solid fertilizer again.But sylvite and urea liquid form melting charge slurry, need earlier sylvite to be heated to certain temperature, have both increased equipment and energy consumption, have also caused the complicated of production process.
[summary of the invention]
[problem that will solve]
The purpose of this invention is to provide on a kind of base fertilizer that urea soln directly is sprayed onto nitrogenous, phosphorus, potassium, spray granulating is produced the method for granular nitrogen phospho potash complex fertilizer.
[technical scheme]
Ultimate principle of the present invention is: utilize and contain certain moisture and the higher temperature of urea soln itself in the urea soln, directly be sprayed onto nitrogenous, the phosphorus of metering respectively, the powdery base fertilizer surface of potassium, one than higher prilling temperature under mixing granulation, directly make the granular nitrogen phospho potash complex fertilizer
Because material has different solubleness under differing temps, temperature is higher, and solubleness is bigger, and required granulating moisture is littler during granulation, as urea, phosphorus ammonium, Repone K solubleness such as the following table under 40 ℃ and 70 ℃.
In addition, water viscosity in the time of 100 ℃ has only 0.282cp, and urea soln viscosity in the time of 70 ℃ can reach 1.375cp, is 4 times of water.Therefore, utilize urea soln to substitute the easier granulating of caking agent of portion water as fertilizer sources granulation, granulating rate improves.
With urea is that raw material can be produced nitrogenous high compound manure.Because ammonium chloride, ammonium sulfate nitrogen content are low, can't be made into the high-nitrogen compound fertilizer material, and urea has an evident characteristic, and solubleness is noticeable change along with variation of temperature, when prilling temperature is low, salt solubleness is little, reach granulating condition (being certain amount of liquid phase), needs more water, and after entering drying process, because temperature raises, salt solubleness increases, cause amount of liquid phase to increase, produce secondary granulating phenomenon, thereby make material in the pasty state, production can't be carried out.And if the employing urea soln owing to self temperature height, makes prilling temperature also high, reach granulating condition (being certain amount of liquid phase), only need less moisture, enter drying process after because temperature variation is little, amount of liquid phase does not increase, and can not produce the secondary granulating, so produce unaffected.
The present invention realizes like this.The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention is to be that 65.0～99.7 weight %, temperature are 80～140 ℃ urea soln with the concentration in the urea plant; spray on the base fertilizer of nitrogenous, phosphorus in the tablets press, potassium; through the revolution granulation, gained material drying, cooling, screening promptly get the granular nitrogen phospho potash complex fertilizer.
The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention, described preferable urea concentration are 90.0～99.7 weight %.
The add-on of urea soln is decided on the grade and the raw material water content of producing compound manure, as producing formula N-P
2O
5-K
2The compound manure of O=12-12-24, required urea soln amount are just than producing N-P
2O
5-K
2The O=23-12-6 much less; And in producing, the compound manure such as the fertilizer formula N-P of lower concentration
2O
5-K
2O=10-10-10, N-P
2O
5-K
2O=8-9-8, the amount of required urea soln just still less.Except that the product position influence of compound manure, the water content of raw material also directly affects the add-on of urea soln, and as raw material moisture too high (normal superphosphate contains moisture 15%), at this moment the urea soln dosage just seldom.In general, the high density raw material mixes its moisture controlled of back below 3%, and middle concentration moisture controlled is below 4%, and lower concentration moisture then is controlled at below 6%.In the production method of compound manure of the present invention, the add-on of urea soln can account for 5～50 weight % (rolling over 100% urea) of the total quantity of goods produced of fertilizer, and preferable add-on is 10～30 weight % (rolling over 100% urea).
The concentration of urea soln is mainly decided on production process pipeline transportation distance, and is short as producing distance, then selects high concentration urea solution, long as shipment distance, then reduces urea concentration, and no Special Circumstances are selected high concentration urea solution as far as possible.
The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention, nitrogenous, the phosphorus of described adding, the base fertilizer of potassium are one or more the mixtures in ammonium chloride, sulphur ammonium, general calcium, double superhosphate, fused(calcium magnesium)phosphate, monoammonium phosphate, diammonium phosphate, Repone K, vitriolate of tartar, the saltpetre.The add-on of the base fertilizer of nitrogenous, phosphorus, potassium and kind are according to the nutrient demand situation of the formula of required compound manure and farm crop and fixed.Before the granulation, if base fertilizer is a particulate state, fragmentation makes granularity less than 1 millimeter, to guarantee that compound manure mixes and the granulation quality to the base fertilizer of nitrogenous, phosphorus, potassium in advance in adding tablets press.
The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention, the time of described revolution granulation is 4～30 minutes, the preferable revolution granulation time is 6～12 minutes.
The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention, in when batching because the npk nutrient ratio cooperates and the needs of granulation, also can add a certain amount of weighting agent, described weighting agent is a clay-type substance, as kaolin, wilkinite, china clay, potter's clay, talcum powder, carclazyte etc., clay-type substance is levigate before adding, and fineness is less than 80 orders.The add-on of clay-type substance is mainly decided on the grade and the selected raw material of production compound manure, as producing high-concentration compound fertilizer material, its fertilizer formula N-P
2O
5-K
2O=15-15-15, the add-on of clay just seldom, perhaps even can not add clay.And produce the lower concentration compound manure, its fertilizer formula is N-P
2O
5-K
2During O=8-9-8, the raw material of selected production is again during as the high fertilizer of nutrient contents such as urea, phosphorus ammonium, Repone K, just needs to add a large amount of clays (about 50%) and reduce the requirement that nutrient reaches the fertilizer formula of production as weighting agent; If when selecting general calcium, ammonium chloride, urea, vitriolate of tartar as the raw material of compound fertilizer making, then the clay add-on just seldom even can not add.
The weighting agent that adds can also be a certain amount of organic class material, makes organic-inorganic compound fertilizer.The organic class material that adds can be become thoroughly decomposed exsiccant livestock and poultry manure, plant straw, humic acids, the peat composed of rotten mosses etc., and organic class material is levigate before adding, and fineness is less than 2 millimeters.
The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention also can add a certain amount of pigment mixing granulation and make the colour composite fertilizer material in tablets press, described pigment is acid pigment, and its add-on is 0.004～0.025 weight %.
The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention; because urea soln sprays into and participates in granulation in the tablets press; improved prilling temperature; make traditional granulation process prilling temperature bring up to about about 70 ℃ of prilling temperature of the present invention at 20～40 ℃; moisture content when fertiliser granulates is not dry after the granulation is reduced to about 2% from about 5%; reduced the load of follow-up drying process, coal consumption is reduced to 20 kilograms of/ton fertilizer by 54 kilograms of/ton fertilizer.
Because the speed that salt sosoloid forms has also been quickened in the raising of prilling temperature, and the chemical reaction of fertilizer salt is finished in the granulation stage as far as possible, avoids continuing reaction in dry kiln, causes the uppity defective of secondary granulating.
In addition, utilize the viscosity of urea soln, help the material granulating, make the material granulating rate bring up to 90% by 70%, reduced returning charge, it is about 30% that throughput is increased, and power consumption is reduced to 30 degree/ton fertilizer by 39 degree/ton fertilizer.The fertilizer moisture content of finished products reduces, and is reduced to 1.0% by 1.5%, and granule strength is brought up to about 30 newton/grains by original about 12 newton/grains, and particle appearance improves, and caking tendency is alleviated.
[beneficial effect]
The method of preparing composite N-P-K fertilizer directly from urea solution of the present invention compared with prior art has following advantage:
One, the method for preparing composite N-P-K fertilizer directly from urea solution of the present invention; employing directly sprays into the urea soln in the urea plant method of producing compound manure on the base fertilizer in the tablets press; saved the expense such as granulation, packing, transportation of urea concentrated solution; the fragmentation of urea when also saving the solid urea compound fertilizer making; simplified Production Flow Chart; reduced production cost, also provide a new approach of producing compound manure for factory that makes urea.
Two, introduce new production technique, improved prilling temperature, reduced the required moisture of granulation of fertilizer, alleviated the load of drying process, the fertilizer granulating rate improves, and has increased throughput and can produce the high-nitrogen compound fertilizer material.Reduced the fertilizer moisture content of finished products, improved fertiliser granulates intensity, slowed down fertilizer agglomeration, particle appearance reaches improvement.
Three, the production equipment automation control system improves, and has reduced operator, has improved operating environment, the production process balance that more becomes, constant product quality.
[embodiment]
Further set forth the present invention below by description, but embodiment not a limitation of the present invention to the embodiment of the invention.
Embodiment 1:
Concentration is that 95 weight %, temperature are 123 ℃ urea soln 260 grams, squeezes in the rotary drum granulator with pump, has powder ammonium phosphate (to contain N 11%, P in the tablets press
2O
543%) 360 grams, Repone K (contains K
2O 60%) 250 grams, potter's clay 140 grams, through about 6 minutes granulation, 68.9 ℃ of granulation temperature of charge, the moisture content when the granulation material goes out the tablets press mouth is 1.97%, balling ratio 93%.Material temperature after the granulation is about 150 ℃ warm air drying, and dried material through cooling, screening, just obtains the compound manure that granularity is 1～4.75mm again.Fertilizer product analytical results: N 14.86%, P
2O
515.05%, K
2O 15.13%, total available nutrient (N+P
2O
5+ K
2O)=45.04%, fertilizer moisture is 0.95%, and intensity is 29 newton, balling ratio 91.5%.
Embodiment 2:
Concentration is that 95 weight %, temperature are 123 ℃ urea soln 400 grams, squeezes in the rotary drum granulator with pump, has powder ammonium phosphate (to contain N 11%, P in the tablets press
2O
543%) 280 grams, Repone K (contains K
2O 60%) 250 grams; wilkinite 85 grams; through about 12 minutes granulation; 71.2 ℃ of granulation temperature of charge; moisture content when the granulation material goes out the tablets press mouth is 2.05%, balling ratio 94%, and the material temperature after the granulation is about 150 ℃ warm air drying; dried material through cooling, screening, just obtains the compound manure that granularity is 1～4.75mm again.Fertilizer product analytical results: N 20.10%, P
2O
512.08%, K
2O 15.25%, total available nutrient (N+P
2O
5+ K
2O)=47.43%, fertilizer moisture is 1.01%, and intensity is 34 newton, balling ratio 92.0%.
Embodiment 3:
Concentration is that 70 weight %, temperature are 80 ℃ urea soln 250 grams, squeezes in the rotary drum granulator with pump, has fused(calcium magnesium)phosphate (to contain P in the tablets press
2O
514%, H
2O 1%) 500 grams, white fertilizer (contains P
2O
530%, H
2O 3%) 70 grams, vitriolate of tartar (contains K
2O 50%, H
2O 1%) 160 grams, through super-dry and levigated chicken manure 80 grams, through about 20 minutes mixing granulation, the material after the granulation through cooling, screening, just obtains the compound manure that granularity is 1～4.75mm again with the warm air drying of 120～180 ℃ of temperature, dried material.Fertilizer product analytical results: N 8.00%, P
2O
59.05%, K
2O 8.10%, total available nutrient (N+P
2O
5+ K
2O)=25.15%, fertilizer moisture is 2.49%, and intensity is 15 newton, and balling ratio is more than 90%.
Embodiment 4:
Concentration is that 80 weight %, temperature are 100 ℃ urea soln 100 grams, squeezes in the rotary drum granulator with pump, has normal superphosphate (to contain P in the tablets press
2O
516%, H
2O 5%) 500 grams, diammonium phosphate (contains P
2O
546%, N 18%) 50 grams, saltpetre (contains K
2O 46%, and N 13%) 220 grams, ammonium sulfate (contains N 20%, H
2O 1%) 150 grams, be particulate state as base fertilizer, all need broken, fineness is passed through about 4 minutes mixing granulation less than 1 millimeter, the warm air drying of 150～250 ℃ of temperature of the material after the granulation, dried material through cooling, screening, just obtains the compound manure that granularity is 1～4.75mm again.Fertilizer product analytical results: N 10.20%, P
2O
510.02%, K
2O 10.10%, total available nutrient (N+P
2O
5+ K
2O)=30.32%, fertilizer moisture is 2.00%, and intensity is 20 newton, and balling ratio is more than 90%.
Embodiment 5:
Concentration is that 99.7 weight %, temperature are 140 ℃ urea soln 450 grams, squeezes in the rotary drum granulator with pump, has monoammonium phosphate (to contain P in the tablets press
2O
543%, N 11%) 280 grams, Repone K (contains K
2O 60%) 250 grams, (fineness is less than 80 orders, H for kaolin
2O 8%) 30 grams, through about 30 minutes mixing granulation, the material after the granulation through cooling, screening, just obtains the compound manure that granularity is 1～4.75mm again with the warm air drying of 110～170 ℃ of temperature, dried material.Fertilizer product analytical results: N 23.10%, P
2O
512.10%, K
2O 15.25%, total available nutrient (N+P
2O
5+ K
2O)=50.45%, fertilizer moisture is 0.95%, and intensity is 30 newton, and balling ratio is more than 90%.
Embodiment 6:
Concentration is that 90 weight %, temperature are 120 ℃ urea soln 200 grams, squeezes in the rotary drum granulator with pump, has double superhosphate (to contain P in the tablets press
2O
541%, H
2O 3%) 340 grams, Repone K (contains K
2O 60%) 230 grams, ammonium chloride (containing N 24.5%) 250 grams, as base fertilizer is particulate state, all need broken, fineness is passed through about 10 minutes mixing granulation less than 1 millimeter, the warm air drying of 130～180 ℃ of temperature of the material after the granulation, dried material through cooling, screening, just obtains the compound manure that granularity is 1～4.75mm again.Fertilizer product analytical results: N 14.25%, P
2O
514.05%, K
2O 14.10%, total available nutrient (N+P
2O
5+ K
2O)=42.40%, fertilizer moisture is 1.08%, and intensity is 28 newton, and balling ratio is more than 90%.
Embodiment 7:
Concentration is that 95 weight %, temperature are 123 ℃ urea soln 240 grams, squeezes in the rotary drum granulator with pump, has monoammonium phosphate (to contain N 10%, P in the tablets press
2O
542%) 200 grams, diammonium phosphate (contains N 18%, P
2O
546%) 150 grams, vitriolate of tartar (contains K
2O 50%) 300 grams, humic acids (fineness is less than 2 millimeters) 120 grams, as base fertilizer is particulate state, all need broken, fineness is passed through about 25 minutes mixing granulation less than 1 millimeter, the warm air drying of 130～180 ℃ of temperature of the material after the granulation, dried material through cooling, screening, just obtains the compound manure that granularity is 1～4.75mm again.Fertilizer product analytical results: N 15.03%, P
2O
515.28%, K
2O 15.10%, total available nutrient (N+P
2O
5+ K
2O)=45.41%, fertilizer moisture is 0.98%, and intensity is 34 newton, and balling ratio is more than 90%.
Claims (9)
1, a kind of method of preparing composite N-P-K fertilizer directly from urea solution; the production stage that it is characterized in that this method is to be that 90～99.7 weight %, temperature are 80～140 ℃ urea soln with the concentration in the urea plant; spray on the base fertilizer of nitrogenous, phosphorus in the tablets press, potassium; through the revolution granulation, gained material drying, cooling, screening promptly get the granular nitrogen phospho potash complex fertilizer.
2, the method for claim 1 is characterized in that: with 100% ureometer, the add-on of described urea soln is 5～50 weight % that add the total quantity of goods produced of fertilizer.
3, the method for claim 1 is characterized in that: with 100% ureometer, the add-on of described urea soln is 10～30 weight % that add the total quantity of goods produced of fertilizer.
4, the method for claim 1 is characterized in that: the base fertilizer of described nitrogenous, phosphorus, potassium is one or more the mixture in ammonium chloride, sulphur ammonium, general calcium, double superhosphate, fused(calcium magnesium)phosphate, monoammonium phosphate, diammonium phosphate, Repone K, vitriolate of tartar, the saltpetre.
5, the method for claim 1 is characterized in that: the revolution granulation time is 4～30 minutes.
6, the method for claim 1 is characterized in that: the revolution granulation time is 6～12 minutes.
7, the method for claim 1 is characterized in that: the base fertilizer of, phosphorus nitrogenous except that adding in tablets press, potassium, also add weighting agent.
8, method as claimed in claim 7, it is characterized in that: described weighting agent is clay-type substance or organic class material, clay-type substance is selected from kaolin, wilkinite, china clay, potter's clay, talcum powder or carclazyte, the fineness of described clay-type substance is less than 80 orders, organic class material is selected from become thoroughly decomposed exsiccant livestock and poultry manure, plant straw, humic acids or the peat composed of rotten mosses, and the fineness of described organic class material is less than 2 millimeters.
9, the method for claim 1 is characterized in that: add the pigment mixing granulation and make the colour composite fertilizer material in tablets press, described pigment is acid pigment, and its add-on is 0.004～0.025 weight %.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001162357A CN1151097C (en) | 2000-05-30 | 2000-05-30 | A kind of method that urea solution directly prepares nitrogen, phosphorus and potassium compound fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001162357A CN1151097C (en) | 2000-05-30 | 2000-05-30 | A kind of method that urea solution directly prepares nitrogen, phosphorus and potassium compound fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1280969A CN1280969A (en) | 2001-01-24 |
| CN1151097C true CN1151097C (en) | 2004-05-26 |
Family
ID=4585646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001162357A Expired - Fee Related CN1151097C (en) | 2000-05-30 | 2000-05-30 | A kind of method that urea solution directly prepares nitrogen, phosphorus and potassium compound fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151097C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413813C (en) * | 2006-04-07 | 2008-08-27 | 聊城鲁西化工第四化肥厂 | Prodn method of high azote, high potassium and sulfenyl 3-element compound fertilizer |
| CN102746049B (en) * | 2012-08-06 | 2014-04-02 | 河南心连心化肥有限公司 | Humic acid organic-inorganic compound fertilizer and production process thereof |
| CN102976829A (en) * | 2012-11-07 | 2013-03-20 | 无锡保利化肥有限公司 | Efficient compound fertilizer |
| CN103408346B (en) * | 2013-06-19 | 2015-05-20 | 中农舜天生态肥业有限公司 | Polymerization amino acid synergistic sustained-release composite fertilizer and preparation method thereof |
| CN105294357A (en) * | 2015-12-08 | 2016-02-03 | 广西利翔畜牧有限公司 | Fertilizer specially used for jaboticaba |
-
2000
- 2000-05-30 CN CNB001162357A patent/CN1151097C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1280969A (en) | 2001-01-24 |
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